Home / 138,719.87-191,433.91-75,057.66

Finding the Fourth Proportional to 138,719.87, 191,433.91 and 75,057.66

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Solution

The fourth proportional to 138,719.87, 191,433.91 and 75,057.66 is: 103,579.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,719.87 : 191,433.91 = 75,057.66 : x
  2. Step 2: Convert to fraction form
    138,719.87/191,433.91 = 75,057.66/x
  3. Step 3: Cross multiply
    138,719.87x = 191,433.91 × 75,057.66
  4. Step 4: Simplify right side
    138,719.87x = 14,368,581,329.25
  5. Step 5: Solve for x
    x = 14,368,581,329.25/138,719.87
  6. Step 6: Final answer
    x = 103,579.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.